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12-09-2018
Mathematics

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The life span of a new flameless candle from a certain company is normally distributed. The mean life is 300 hours with a standard deviation of 40 hours. Find a range of candle life span which lies within 2 standard deviation, about 95%.

Between 180 and 340 hours
Between 260 and 340 hours
Between 180 and 420 hours
Between 220 and 380 hours

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benscheidhauerozarks benscheidhauerozarks

12-09-2018

The second one is the answer.

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